Van Damme Daniel, Geelen Danny
Department of Plant Systems Biology, Flanders Institute for Biotechnology, Ghen University, B-9052 Ghent, Belgium.
Cell Biol Int. 2008 Feb;32(2):178-87. doi: 10.1016/j.cellbi.2007.10.010. Epub 2007 Nov 12.
Somatic cytokinesis in higher plants involves, besides the actual construction of a new cell wall, also the determination of a division zone. Several proteins have been shown to play a part in the mechanism that somatic plant cells use to control the positioning of the new cell wall. Plant cells determine the division zone at an early stage of cell division and use a transient microtubular structure, the preprophase band (PPB), during this process. The PPB is formed at the division zone, leaving behind a mark that during cytokinesis is utilized by the phragmoplast to guide the expanding cell plate toward the correct cortical insertion site. This review discusses old and new observations with regard to mechanisms implicated in the orientation of cell division and determination of a cortical division zone.
高等植物中的体细胞胞质分裂，除了实际构建新的细胞壁外，还涉及分裂区域的确定。已有几种蛋白质被证明在体细胞植物细胞用于控制新细胞壁定位的机制中发挥作用。植物细胞在细胞分裂的早期阶段确定分裂区域，并在此过程中使用一种短暂的微管结构——前期带（PPB）。PPB在分裂区域形成，留下一个标记，在胞质分裂期间，成膜体利用这个标记引导扩展的细胞板朝向正确的皮质插入位点。本文综述了有关细胞分裂方向和皮质分裂区域确定所涉及机制的新旧观察结果。
